/**
 * Copyright (c) 2003, 2004, Chess iT
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 * 
 * - Redistributions of source code must retain the above copyright notice, this
 *   list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 *
 * - Neither the name of Chess iT, nor the names of its contributors may be used 
 *   to endorse or promote products derived from this software without specific
 *   prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
 * POSSIBILITY OF SUCH DAMAGE.
 * 
 */
package nl.chess.it.util.config.examples.simple;

import java.util.Iterator;

import nl.chess.it.util.config.ConfigValidationResult;


/**
 * A simple example of the use of a {@link nl.chess.it.util.config.Config} class.
 *
 * @author Guus Bosman (Chess iT)
 * @version $Revision: 1.1.1.1 $
 */
public class SimpleApplication {
    private static SimpleConfig config;

    public static void main(String[] args) {
        String sayingHi = getConfig().getWelcomeText();
        boolean yesOrNo = getConfig().isThisANiceClass();
        int numberOfDays = getConfig().getNumberOfDays();
        java.net.URL url = getConfig().getNiceWebsite();
    }

    /**
     * Returns always the same instance of a {@link SimpleConfig}.
     * 
     * @return SimpleConfig. Never <code>null</code>.
     */
    private static SimpleConfig getConfig() {
        if (config == null) {
            config = new SimpleConfig(SimpleConfig.RESOURCE_NAME);

            ConfigValidationResult configResult = config.validateConfiguration();

            if (configResult.thereAreErrors()) {
                System.out.println("Errors in configuration");

                for (Iterator iter = configResult.getErrors().iterator(); iter.hasNext();) {
                    System.out.println(" > " + iter.next());
                }

                System.exit(1);
            }

            if (configResult.thereAreUnusedProperties()) {
                System.out.println("Unused properties");

                for (Iterator iter = configResult.getUnusedProperties().iterator(); iter.hasNext();) {
                    System.out.println(" > " + iter.next());
                }
            }
        }

        return config;
    }
}
